除了硬、中、软之外，如何在optaplanner中添加更多的等级来得分？

public class CustomScoreCalculator extends AbstractScoreCalculator<Solution> {

    @Override
    public void calculateScore(Solution solution) {
        ConstraintFactory constraintFactory = getConstraintFactory();

        scoreHolder.setConstraintWeight("高级规则1",
                HardSoftScore.ofHard(1)); // 定义"高级"等级的得分规则1

        scoreHolder.setConstraintWeight("高级规则2",
                HardSoftScore.ofSoft(2)); // 定义"高级"等级的得分规则2

        // 其他等级的得分规则...

        // 使用ConstraintStream API定义规则
        scoreHolder.penalize("高级规则3",
                constraintFactory.from(Task.class)
                        .filter(task -> task.getLevel().equals("高级"))
                        .penalize("高级规则3", HardSoftScore.ONE));
    }
}

<solver>
    ...
    <scoreDirectorFactory>
        ...
        <scoreDrl>com/example/CustomScoreCalculator.drl</scoreDrl>
    </scoreDirectorFactory>
</solver>